JPH072513Y2 - Sheet ejector for collator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention places sheets such as copy sheets obtained by copying a plurality of pages from a plurality of pages of originals in a plurality of bins for each page. The present invention relates to a sheet ejecting device of a collator that takes out sheets from each sheet bundle on the bin in a predetermined order and stacks the sheets in a state of being sorted by a sheet ejecting stacker device.

[Prior Art] In a collator, when many copies of a plurality of pages are copied, the copy sheets are sorted and sequentially aligned from the first page, and the copy sheets of each copy are bound by a stapler for binding. In this collator, as shown in FIG. 5, a plurality (eight in the illustrated example) of bottles 2 are vertically spaced from the collator body 1 at appropriate intervals from the collator body 1 to the front thereof. It is arranged so as to project. Inside the collator body 1, the paper feed rollers 3 are provided corresponding to the respective bins 2.
Is provided. The paper feed roller 3 rotates to take out the uppermost copy sheet from a bundle of copy sheets (not shown) placed on the bin 2 and take it into the collator body 1.

Inside the collator body 1, a conveyor belt 4 is arranged so that its conveyor direction is vertical. Further, a feed roller 5 and a guide plate 6 are arranged between the transport belt 4 and each of the paper feed rollers 3, and the guide plate 6 guides the sheet toward the transport belt 4 as well as the feed roller. 5 allows the sheet to smoothly follow the surface of the conveyor belt 4. The conveyance belt 4 moves the copy sheet vertically downward. Also, the collator body 1
A pair of paper discharge rollers 7 that rotate in mutually opposite directions are arranged in the lower part of the inside, and the copy sheet conveyed downward by the conveyor belt 4 is discharged toward the outside of the collator body 1. It is paid out by the roller 7. Further, a jump table 10 is arranged as a sheet guide member at the position where the paper discharge roller 7 is arranged. This jump base 10 is provided with a trapezoidal notch at the position where the paper discharge rollers 7 are arranged. The notch has a trapezoidal shape whose width gradually increases in the sheet feeding direction. Then, in the notch, the paper discharge roller 7 is mounted on the jump base with its mutual rolling surface.
It is arranged to be slightly lower than 10.

A paper discharge stacker device 8 having a paper discharge tray 9 is disposed in front of the paper discharge roller 7 in the sheet feeding direction.

By the way, each bin has a sheet feed plate 11 on which a sheet bundle is placed.
The sheet feeding plate 11 is inclined so that the front end portion in the sheet feeding direction becomes low as a whole, and the front end portion slightly swings up and down so that the front end portion slightly moves up and down. Can move. Further, the front end portion of the sheet feeding plate 11 is biased upward by an appropriate tension coil spring 12. Further, the plurality of paper feed plates 11 are provided with projections 13 protruding laterally at the front end thereof.
Then, each paper feed plate 11 is connected to one connecting plate through the protrusion 13.
It is connected to 14. That is, the connecting plate 14 is a long plate member extending in the vertical direction on the side surface of the collator body 1, and a rectangular window 15 is opened at a position corresponding to each sheet feeding plate 11 of the connecting plate 14. Then, the projection 13 of the sheet feeding plate 11 is fitted into the window 15 of the connecting plate 14, and when the connecting plate 14 descends, the protrusion 13 is locked by the window 15 and the front end portion of the sheet feeding plate 11 descends. .

An upper end of the connecting plate 14 is biased upward by a tension coil spring 16, and a groove 17 is engraved at a lower end of the connecting plate 14 so as to extend in the vertical direction. The pin 18 fixed to the side surface of 1 is inserted.
Therefore, when the pin 18 relatively moves in the groove 17 along the groove 17, the connecting plate 14 can move up and down while maintaining the vertical posture.

A rotation fulcrum 21 is fixed to the side surface of the lower end portion of the collator body 1, and an operating lever 20 is further rotatably installed around the rotation fulcrum 21. Further, a groove 23 extending obliquely with respect to the vertical direction is formed at the lower end of the connecting plate 14, and a protrusion 22 protruding from the surface of the operating lever 20 is provided in the vicinity of the rotation fulcrum 21 of the operating lever 20. Is provided. The protrusion 22 is fitted in the groove 23, and the protrusion 22
Within 23, move relatively along this groove 23. Therefore, when the operating lever 20 is pushed down, the protrusion 22 rotates downward about the fulcrum 21, and in the process of this rotation, the protrusion 22 relatively moves in the groove 23, so that the protrusion 22 is at the lowest position. When moved to, the connecting plate 14 is located at the lowest position against the biasing force of the coil spring 16. On the other hand, when the pushing down of the lever 20 is released, the connecting plate 14 becomes free and is raised by the coil spring 16.

In the collator configured as described above, first, for example, a bundle of a large number of copy sheets obtained by copying the first page of an original is set in the uppermost bin 2 and the copy sheet bundle of the originals of the second and subsequent pages is set. Set the bottles in the second and subsequent bins 2 sequentially.

Then, the operation lever 20 is pushed down to lower the connecting plate 14, thereby lowering the front end portions of all the sheet feeding plates 11 simultaneously. Then, the front end of the sheet bundle on the sheet feed plate 11 slides down and is inserted between the sheet feed plate 11 and the sheet feed roller 3.

Then, when the pushing down of the lever 20 is released, the connecting plate 14 becomes free, and the sheet feeding plate which is out of the constraint by the connecting plate 14 is released.
11 will also be free. Therefore, the connecting plate 14 is lifted by the coil spring 16, and each sheet feeding plate 11 is biased upward by the elastic force of the coil spring 12. As a result, the sheet bundle on the sheet feeding plate 11 is sandwiched between the sheet feeding plate 11 and the sheet feeding roller 3 by the urging force of the coil spring 12.

In this state, page alignment is started. That is, when the driving of the feed roller 5 and the conveyor belt 4 is started and the paper feed rollers 3 are sequentially and selectively driven, the uppermost sheet of the sheet bundle on the paper feed plate 11 is sequentially taken out from each paper feed plate 11. come. Then, this sheet is fed to the paper discharge roller 7 via the conveyor belt 4, is fed out by the paper discharge roller 7, is guided by the jump base 10 and is sequentially discharged to the paper discharge stacker device 8, and its paper discharge tray. Stacked on 9. In this way, the copy sheet bundles sorted and stacked are bound and bound by the stapler in the next step.

Thus, when the sheet conveyed by the conveyor belt 4 is discharged by the discharge rollers 7 onto the discharge tray of the discharge stacker device 8, if the sheet is discharged in a flat posture,
This sheet receives air resistance and its front edge rises,
Alternatively, it falls and cannot be dropped to a predetermined position on the paper discharge tray 9. This phenomenon remarkably appears when the basis weight (g / m ² ) of paper is small, that is, when the sheet is lighter,
When this phenomenon appears, it becomes impossible to stack the sheets with their edges aligned. Therefore, normally, as shown in FIG. 6, the mutual rolling surfaces of the paper discharge rollers 7 are set lower than the surface of the jump table 10 for guiding the sheet, so that the sheet S passing on the jump table 10 is made to be the same. On the other hand, the sheet S is curved with a direction parallel to the longitudinal direction as the central axis, or wavy lines that meander in the width direction of the sheet S are provided.
As a result, the seat S can be placed on the waist and the apparent rigidity can be increased. Therefore, rising and falling of the front edge of the seat can be prevented.

[Problems to be Solved by the Invention] However, in the conventional sheet discharging device, since the notch of the jump base 10 has a shape such that its width is wide in the discharging direction of the sheet S, the sheet S does not have a front surface. A curvature of uniform depth is formed from the edge to the trailing edge. In this case, if the bending depth is increased to increase the apparent rigidity of the sheet S, an unreasonable force acts on the sheet S passing through the paper discharge roller 7 and the jump table 10 to cause the trailing edge of the sheet S. Wrinkles may occur on the part.

The present invention has been made in view of such problems,
An object of the present invention is to provide a sheet discharge device for a collator in which wrinkles do not occur in the sheet even if the sheet is deeply curved in order to increase the apparent rigidity of the sheet.

[Means for Solving the Problem] A sheet ejecting device for a collator according to the present invention sequentially ejects a plurality of bins on which a sheet bundle is placed and sheets taken out from the sheet bundle placed on each bin. A pair of paper discharge rollers for discharging onto the sheet receiving member of the paper stacker device and a notch are formed in the front edge portion in the sheet feeding direction by the paper discharge rollers, and the paper discharge roller is provided in the notch. In a sheet discharge device of a collator, which is provided with a guide member for guiding the sheet discharged by the discharge roller to the sheet receiving member of the discharge stacker device,
The sheet guide surface of the guide member is located above the mutual rolling surface of the paper discharge roller, and the width of the notch is smaller in the sheet feeding direction.

[Operation] In the present invention, the guide member for guiding the sheet discharged by the discharge roller to the sheet receiving member of the discharge stacker is formed with a notch so that its width becomes smaller in the sheet sending direction. ing. Therefore, even if a large curve is given to the sheet jumping from the front edge of the guide member to the sheet receiving member at the front edge portion of the notch of the guide member, the notch is compared at the rear edge portion. Since it has a relatively wide width, the curvature at the trailing edge is small. Therefore, no unreasonable force is applied to the trailing edge of the sheet, and wrinkles can be prevented from occurring.

Embodiments Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a plan view showing a sheet discharging device according to an embodiment of the present invention, and FIG. 2 is a perspective view thereof. In the present embodiment, the structure of the jump base 33 as a guide member for guiding the sheet S from the paper discharge roller 7 to the paper discharge tray 9 as a sheet receiving member is different, and the other structures are the same as those of the conventional sheet discharge device. The present embodiment will be described with reference to FIG.

A pair of roller shafts 32 are bridged between the pair of side plates 30 and 31 of the collator body 1. All of the roller shafts 32 are arranged in the horizontal direction orthogonal to the feeding direction A of the sheet S and at an appropriate vertical interval with respect to each other. The paper discharge roller 7 is coaxially attached to each roller shaft 32. The roller shaft 32 is configured such that, for example, the roller shaft 32 above the roller shaft 32 is rotationally driven by an appropriate driving means. Therefore, the upper paper ejection roller 7 is rotationally driven, and the lower paper ejection roller 7 is It rolls to the upper discharge roller 7.

The paper output tray 9 of the paper output stacker device has a flat upper surface, and a locking portion 9a for locking the front edge of the sheet S at the front edge thereof.
Is erected.

The jump base 33 has its both side edges fixed to the side plates 30 and 31 by bolts 34, and is installed with its seat guide surface horizontal. The jump base 33 has a notch 35 formed at the front edge thereof. The jump base 33 is installed by inserting its front edge portion between a pair of roller shafts 32 and disposing the paper discharge rollers 7 in the notches 35. In this case, the notch 35 is formed at a position displaced to the side plate 31 side with respect to the paper discharge roller 7. Therefore, as shown in FIG. 3, the notch 35 and the paper discharge roller 7 arranged in the notch 35 are
The centers in the width direction are arranged so as to be offset from each other, and the notch 35 is formed to be deviated to the side plate 31 side.

Thus, the notch 35 is formed by being cut out in a trapezoidal shape in the discharge direction A of the sheet S. That is, the notch 35 has an acute angle α between the bottom side and the hypotenuse thereof, and the discharge direction A of the sheet S by the discharge roller 7 is A.
Is formed in line symmetry with a line segment parallel to the center as the center. Therefore, the width of the notch 35 has a width A in the sheet discharge direction A.
It is formed so that it becomes narrower toward the front of
The width of the rear portion in the sheet discharge direction A is wide. In addition, the upper surface of the jump base 33, that is, the seat guide surface,
It is set to be higher than the mutual rolling surface of the pair of paper discharge rollers 7.

Next, the operation of the sheet ejecting device of the collator configured as described above will be described. From the bundle of sheets placed on the sheet feeding plate 11 of each bin 2, as described above, one sheet
The sheets are taken out one by one and sequentially conveyed to the position where the paper discharge rollers 7 are arranged. This sheet slides on the jump base 33 and is caught between the paper discharge rollers 7 arranged in the notches 35 at the front part thereof. Then, the sheet S is sent forward by the sheet discharge rollers 7 and jumped from the jump table 33 onto the sheet receiving plate 9 of the sheet discharge stacker device 8 to be fed.
The sheets S are stacked and placed on the sheet receiving plate 9.

In this case, the mutual rolling surfaces of the discharge rollers 7 are
Since it is arranged so as to be slightly lower than the upper surface (sheet guide surface) of 33, the sheet S on the jump table 33 should be caught in the sheet discharge roller 7 as schematically shown in FIG. As a result, the lower part is curved so as to be convex. Therefore,
The sheet S sent out from the paper discharge roller 7 is curved around a direction parallel to its longitudinal direction. As a result, the seat S is stiffened, the apparent rigidity of the seat S is increased, and the seat S is securely placed on the seat receiving plate 9 without rising or falling.

Further, in the present embodiment, the notch 35 is formed so that its width becomes wider at the rear portion of the sheet S in the feeding direction A. Therefore, in order to increase the apparent rigidity of the sheet S, a relatively large drop is provided between the mutual rolling surfaces of the paper discharge rollers 7 and the upper surface of the jump base 33, so that the sheet S may be curved greatly. Since the rear portion of the cutout 35 is wide, wrinkles are not generated in the rear portion of the sheet S.

Further, in the present embodiment, the position where the cutout 35 is formed is offset to the side plate 31 side from the position where the paper discharge roller 7 is arranged.
For this reason, as schematically shown in FIG. 4, the center of the curve formed in the sheet S (the lowermost curve portion) is displaced to the side plate 31 side.

Thus, in the case where the paper discharge roller is arranged at the center of the notch in the width direction as in the conventional case, as shown schematically in FIG. A curve is formed around the center. In this case, the discharged sheet S
When the sheet drops along the side plate 31 onto the sheet receiving plate 9, the air resistance is large on the side plate 31 side of the sheet and is small on the side away from the side plate 31. Therefore, in the sheet S, the portion far from the side plate 31 first drops onto the sheet receiving plate 9, and the portion on the side plate 31 side has a large air resistance, and drops later. Therefore, the sheet S easily falls to a position separated from the side plate 31. That is, when the curved portion is formed at the center of the sheet S, the sheet S is subjected to the action of falling to a position separated from the side plate 31. By the way, when the sheet S is discharged, there are slight deviations in the discharging speed, the discharging position, the discharging posture, and the like, so that the landing position of the sheet S varies. However, due to the above-mentioned action,
When the sheets S are stacked in a position apart from the side plate 31, the disturbance of the sheets S can no longer be corrected by the jogger.

However, as in the present embodiment, by displacing the bending center position of the sheet S toward the side plate 31 side, the air resistance received by the side plate 31 side portion of the sheet S becomes small, and the sheet S as described above is formed. There is no deviation in the falling position of. Therefore, the sheet S is surely deviated to the side plate 31 side and placed on the sheet receiving plate 9. Therefore, even if there is some sheet irregularity in the placed sheet bundle, the jogger can eliminate the sheet irregularity and correct the sheets S in an aligned state.

[Advantages of the Invention] According to the present invention, the seat can be discharged to the stacker device while the waist is attached to the seat and the apparent rigidity is increased, and the guide is provided to increase the apparent rigidity. Even if the front edge of the member is largely curved, the notch formed in the guide member does not cause wrinkling in the sheet because the rear portion in the sheet feeding direction is formed wide. Therefore, according to the present invention, the sheet can be discharged extremely smoothly.

[Brief description of drawings]

FIG. 1 is a plan view showing a sheet discharging device according to an embodiment of the present invention, FIG. 2 is a perspective view thereof, FIGS. 3 and 4 are schematic diagrams illustrating the same operation, and FIG. FIG. 6 is a side view showing the structure of the collator, and FIGS. 6 and 7 are schematic views showing a conventional sheet discharging device. 1; collator, 2; bin, 7; discharge roller, 8; discharge stacker device, 9; sheet receiving plate, 10, 33; jump table, 30, 31; side plate,
35; cutout

Claims (4)

[Scope of utility model registration request] 1. A plurality of bins on which a sheet bundle is placed, and a pair of ejections for sequentially ejecting sheets taken out from the sheet bundles placed on each bin onto a sheet receiving member of a sheet ejection stacker device. A notch is formed in the paper roller and a front edge portion in the sheet feeding direction of the sheet discharge roller, and the sheet discharge roller is arranged in the notch, and the sheet discharged by the sheet discharge roller is In a sheet discharge device of a collator provided with a guide member for guiding the sheet receiving member of the sheet discharge stacker device, the sheet guide surface of the guide member is located above a mutual rolling surface of the sheet discharge rollers,
The sheet ejecting device for a collator, wherein the width of the notch is small in the sheet feeding direction. 2. The sheet ejecting device for a collator according to claim 1, wherein the notch has a trapezoidal shape in the sheet feeding direction. 3. The sheet ejecting device for a collator according to claim 2, wherein an angle formed by a side edge of the cutout and a base of the trapezoid is an acute angle. 4. The collator according to claim 1, wherein the center of the cutout in the width direction and the center of the discharge roller in the width direction are deviated from each other. Sheet ejector.